Environmental Engineering
Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the

Hardness in water
Residual chlorine in water
Turbidity in water
Dissolved oxygen in water

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Environmental Engineering
Scour valves are provided

At every summit of rising mains
At the foot of rising main along the slope to prevent back running of water
At every depression and dead ends to drain out the waste water that may collect there
At street corners to control the flow of water

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